Composition for removing carbon.



iii era CHARLES A. LEWIS, OF CHICAGO, ILLINOIS,

ASSIGNOR TO ADAMS & ELTING COMPANY,

OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

It 287,589. Specification of No Drawing.

tion engines successive layers of soot are'de- 'posited upon the cylinder heads, walls and the piston heads, due to the fact that insufficient oil, or too rich a mixture has been -j supplied to the cylinders, which soot becomes mixed with the lubricating oil fed to the cylinders, and forms a hard deposit on the various working parts of the engine. In

time these layers of carbon become very thick, offering resistance to the freedom of motion of the working parts and decreas ing the power of the engine. a The carbona-. ceous deposit at times becomes red hot causing premature explosions of the gas at times when the piston is not -in proper position,

thereby causing a general strain on the motorand moving parts.

The primary ob ect of this invention is the provision of a composition of the charaoter set forth which will dissolve the gumlike substance which binds the molecules of carbon together to form the layer above referred to, in order that the carbon molecules may be separated from the layer, and blown out through the exhaust ports of the various cylinders.

In order to produce an efficient and proper composition for this purpose it will be seen that the composition must be non-injurious to the cylinder walls; that the composition will burn, in order that no further deposit is left to clog the working parts of the motor, and that the solvents for the gummy matter be so volatilized that they will readily pass off and not interfere with the comprcssion of the engine. Also that sufiicient retarding elements beincorporated in the compositioir'in order that the volatile solvents will not volatilize without having had time to act upon the carbon layer to dis"- solve the gummy portion thereof. After exhaustive experiments it has been found that a very. efiicient composition may be pro- COMPOSITION FOR REMOVING CARBON.

Application filed January 22, 1917. Serial No. 143,835.

Letters Patent. Patented Dec. 10, 1918 vided for the purpose of combining ketone, alcohol, water,'essential oil of. citronella, or similar oil, and a ing matter. The following proportions are indicated as approximating the proper percent-age of a suitable composition, but: it is to be understood that variation from'the exact proportions thereof may be: made without departing from the spirit of-thisin Yention:

A l etone the aliphatic sec I.

ries Alcohol 29 percent. ,lVater" per cent. Oil of ci-tronella or similar esv i sential oil 1 'per1 c'en't. Coloring matter to suit.

' A ketone of the aliphatic series asjfor eX- ample acetone 1s used in this composition in large proportion on account of itsgreat solvent power, it dissolving the gum-like binder which is present in all motor carbon,

being produced by the baking at the high 7 ten'iperaturein thecylinder of the lubricating oil and carbon soot, thus forming the hard inerustation on the metal parts. The

ketones of this series are the strongest sol vent I have found for this purpose, and I have also found that they are absolutely non-injurious to the metal parts of the engmo.

Alcohol while ,av solvent in itself, yet when combined with one of these ketones gives a longer sustained solvent action of the composition and :1V much greater dissolving power, it also acting asa partial retardent when used in' the proportions specified.

Water is added to the composition to produce, in combination with the ketone and alcohol, a retardent action which is necessary to permit the solvents to act upon the gum binder of the carbon deposit without first volatilizing, and also to convert the water into live steam, which facilitates the breaking up and elimination of the carbon from the motor cylinders through the cut out valves of'the muffler exhausts. The oil of citronella or similar essential oil is added in minute proportion so that the amount of water used in the composition for a retardent action can be reduced to theminimum quantity, the oil of cit-ronella or similar es sential oil being added as an additional retardent.

65 per minute quantity of-colormatter may be added to the composition in.

A slight' trace-of any suitable coloring order to impart any desired individuality of inders in small quantities through either the pet cook or spark plug opening and permitted to stand several hours. The motor can then be started and the carbon blown out through the exhaust. of the motor.

Having thus described .my composition, what I claim as new and desire to secure by Letters Patent is:

1. A .carbon removing composition containing a ketone of the aliphatic series, alcohol and Water, said ketone and alcohol comprising at least 75% of the mixture and said water comprising between 3 and 20%, of the mixture.

2. A carbon removing composition containing acetone, alcohol and water, said acetone and alcohol comprising at least 75% of the mixture and said water comprising between'321nd 20% oi the mixture. 3. Acarbon removing composition comprising more than 50% of a ketone of the aliphatic series, more than 15% and less than 40% of alcohol, more than 3% and less than 20% of Water. I

4. A carbon removing composition comprising more't-han 50% of acetone, more than 15% and less than 40% of alcohol, and nore than 3% and less than 20% of Water.

prising more than 50% 5. A carbon removing composition co1nprising more than 50% of a ketone of the aliphatic series, more than20'j2, and less than 50% of retardents of evaporation. one of said retardents being an essential oil.

(5. A carbon removing composition comprising more than 50% of a ketone of the aliphatic series, more than 20)? and less than 507, of rctardents of evaporation, one of said retardents being oil of citronclla.

7. A carbon removing composition comprising more-than 50% of a ketone of the aliphatic series, more than 15% and less than 407 of alcohol, more than 3% and less than 20% 01 water and some essential oil less than 3%. I

8; A carbon removing composition comaliphatic series, Inore than 15% and less than 450% of alcohol, more than 3% and less than 20% of Water, some oil of citronella less than 3%;-

9. A carbon removing composition comprising 'more. than 50% of acetone, more than 15% and less than 40% of alcohol, morethan 3% and less than 20% of water, some oil of citronella less than 3%.

In testimony whereof I affix my signature in the presence of two witnesses.

CHARLES A. LElVIS.

\Vitnesses Enwann S. Rooms, ALLEN M. REED.

of'a ketone of the- 

